You take it day by day, minute by minute. You reward yourself with breaks like your trip to London,and healthy treats, things that relax or excite you. Think about what your new direction could be. If you know, are there things you could start putting in place? For example, my husband did an initial part time course, while still at work. He could have waited, but it actually helped get him through the last 2 years. A different, more healthy stress maybe. Then he had to take his time to recover, once he retired.
I suspect you are tired, and have a low mood this morning. I'm sure things will look brighter tonight. Ju Ju xx